package dao;

import org.apache.commons.dbutils.QueryRunner;
import org.apache.commons.dbutils.handlers.BeanHandler;
import org.apache.commons.dbutils.handlers.BeanListHandler;
import org.apache.commons.dbutils.handlers.ScalarHandler;
import utils.JdbcUtils;

import java.sql.Connection;
import java.sql.SQLException;
import java.util.List;

public abstract class BaseDao {
    private QueryRunner queryRunner=new QueryRunner();

    public int update(String sql,Object ... args){
        Connection connection= JdbcUtils.getConnection();

        try {
           return queryRunner.update(connection,sql,args);
        } catch (SQLException throwables) {
            throwables.printStackTrace();
            throw new RuntimeException(throwables);
        }


    }

    public <T> T  queryForOne(Class<T> type ,String sql,Object ... args){

        Connection con=JdbcUtils.getConnection();
        try {
            return queryRunner.query(con,sql,new BeanHandler<T>(type),args);
        } catch (SQLException throwables) {
            throwables.printStackTrace();
            throw new RuntimeException(throwables);
        }
    }

    public <T> List<T> queryForList(Class<T> type , String sql, Object ... args) {
        Connection con=JdbcUtils.getConnection();
        try {
            return queryRunner.query(con,sql,new BeanListHandler<T>(type),args);
        } catch (SQLException throwables) {
            throwables.printStackTrace();
            throw new RuntimeException(throwables);
        }
    }

    public Object queryForSingleValue(String sql,Object... args){
        Connection conn=JdbcUtils.getConnection();
        try {

            return  queryRunner.query(conn,sql,new ScalarHandler(),args);
        } catch (SQLException throwables) {
            throwables.printStackTrace();
            throw new RuntimeException(throwables);
        }
    }

}
